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Add 70/20 and 63/84

1st number: 3 10/20, 2nd number: 63/84

70/20 + 63/84 is 17/4.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 20 and 84 is 420

    Next, find the equivalent fraction of both fractional numbers with denominator 420
  2. For the 1st fraction, since 20 × 21 = 420,
    70/20 = 70 × 21/20 × 21 = 1470/420
  3. Likewise, for the 2nd fraction, since 84 × 5 = 420,
    63/84 = 63 × 5/84 × 5 = 315/420
  4. Add the two like fractions:
    1470/420 + 315/420 = 1470 + 315/420 = 1785/420
  5. 1785/420 simplified gives 17/4
  6. So, 70/20 + 63/84 = 17/4
    In mixed form: 41/4

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